HorizonForge: Driving Scene Editing with Any Trajectories and Any Vehicles

• URL: http://arxiv.org/abs/2602.21333v2
• Date: Sun, 01 Mar 2026 00:13:21 GMT
• Title: HorizonForge: Driving Scene Editing with Any Trajectories and Any Vehicles
• Authors: Yifan Wang, Francesco Pittaluga, Zaid Tasneem, Chenyu You, Manmohan Chandraker, Ziyu Jiang,
• Abstract summary: Controllable driving scene generation is critical for realistic and scalable autonomous driving simulation.<n>We introduce HorizonForge, a unified framework that reconstructs scenes as editable Gaussian Splats and Meshes.<n>Experiments show that Gaussian-Mesh representation delivers substantially higher fidelity than alternative 3D representations.
• Score: 63.88996084630768
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Controllable driving scene generation is critical for realistic and scalable autonomous driving simulation, yet existing approaches struggle to jointly achieve photorealism and precise control. We introduce HorizonForge, a unified framework that reconstructs scenes as editable Gaussian Splats and Meshes, enabling fine-grained 3D manipulation and language-driven vehicle insertion. Edits are rendered through a noise-aware video diffusion process that enforces spatial and temporal consistency, producing diverse scene variations in a single feed-forward pass without per-trajectory optimization. To standardize evaluation, we further propose HorizonSuite, a comprehensive benchmark spanning ego- and agent-level editing tasks such as trajectory modifications and object manipulation. Extensive experiments show that Gaussian-Mesh representation delivers substantially higher fidelity than alternative 3D representations, and that temporal priors from video diffusion are essential for coherent synthesis. Combining these findings, HorizonForge establishes a simple yet powerful paradigm for photorealistic, controllable driving simulation, achieving an 83.4% user-preference gain and a 25.19% FID improvement over the second best state-of-the-art method. Project page: https://horizonforge.github.io/ .

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